Yes, @DataModel != @In @Out - you should regard it as equivalent to @Out with the extra databinder stuff. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4094585#4094585 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4094585